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Bending Performance of Glulam Beams Reinforced with Carbon Fiber-Reinforced Plastics Bonded with Polyvinyl Acetate-Based Adhesive  

Park, Jun-Chul (Department of Wood Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University)
Shin, Yoon-Jong (Shinsung basic materials)
Hong, Soon-Il (Department of Wood Science & Engineering, College of Forest & Environmental Sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.37, no.4, 2009 , pp. 364-371 More about this Journal
Abstract
This study was carried out to investigate the bending strength of the Larix glulam beams which were reinforced with CFRP (Carbon fiber reinforced plastic) of which the reinforcement ratios were 0.7% and 2.1% by volume. In the bending test, the rupture shape of the reinforced glulam shows that the reinforced glulam broke firstly in the lowest bottom layer on which tension was loaded, but did not in the upper part reinforced with the CFRP layer. The upper part of the reinforced layer kept strength and did not break when the reinforced glulam broke firstly at the bottom part of the reinforced layer, but broke secondly as loading was increased. In the glulam beams reinforced with CFRP of which the reinforcement ratio was 0.7% by volume, the bending strength of the reinforced beams was increased by 28% at the first break. When beams broke up to the upper part of the reinforced layer, the bending strength of the reinforced beams was increased by 55%, compared to those of control glulam beams. When the glulam beams were reinforced with CFRP of which the reinforcement ratio was 2.1% by volume, the bending strength of the reinforced beams was increased by 77%, compared to those of control glulam beams. The ratio of the height of calculated neutral axis using failure mode recommended by Romani and the height of actual neutral axis using strain gauge was 1.03 and agreed well.
Keywords
CFRP; reinforced glulam; PVAc adhesive; bending strength;
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Times Cited By KSCI : 1  (Citation Analysis)
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